kchr
A tip is to host your own domain at an e-mail provider that allow you to receive e-mail for any recipient in a single mailbox (i.e. catch-all or wildcard), and use the following alias format when signing up at different websites or services:
<website>@<yourdomain.tld>
This allows you to filter incoming e-mail by which website/service you signed up for, regardless of what domain they send e-mail from (it can be different for account notifications vs newsletters etc.).
It will also help you detect if they have sold your contact details or had a data breach without announcing it publicly, since you wouldn’t use that specific e-mail alias elsewhere.
https://en.m.wikipedia.org/wiki/Wikipedia:Database_download
Kiwix seems to be the most popular app to browse offline web pages like this.
For those that are looking to install GrapheneOS and want to ensure that their banking apps work as intended, here is a curated list of supported apps per country:
https://privsec.dev/posts/android/banking-applications-compatibility-with-grapheneos/